Spec Clutch SC424 Stage 4 Performance Clutch Kit

The Spec Clutch SC424 Stage 4 Clutch Kit is an aggressive, competition-grade clutch solution engineered for heavily modified engines demanding maximum torque capacity and instantaneous engagement. Built as a solid-hub evolution of the Stage 3, this kit is the go-to choice for motorsport disciplines where holding power and low rotating mass take priority over street comfort.

Key Features:

• Solid 8-rivet hub design — heat-treated for exceptional strength and long-term durability under extreme loads
• High-clamp pressure plate — delivers increased clamping force for superior torque transfer
• Carbon semi-metallic friction disc — available in 3, 4, or 6-puck configurations to match your application
• 11.000 in. (279mm) disc diameter with a 1.125 in. input shaft diameter and 26-spline count
• Multiple puck options — choose the 3-puck for the lightest rotating assembly, the 6-puck for the smoothest engagement, or the 4-puck as a balanced compromise
• Complete kit — includes pressure plate, clutch disc, release bearing, and installation tool kit

Ideal Applications: Drag racing, road racing, drifting, rally, pulling, and circle track competition. The 6-puck configuration can be used in limited street-driven situations, though the rigid hub design makes this kit unsuitable for regular street driving.

The SC424 is part of SPEC's renowned lineup trusted by competitive drivers across all motorsport disciplines for its extreme holding power, precise engagement, and race-proven reliability.